21002001110211 has 64 divisors (see below), whose sum is σ = 31879301529600. Its totient is φ = 12183089126400.

The previous prime is 21002001110159. The next prime is 21002001110227. The reversal of 21002001110211 is 11201110020012.

It is not a de Polignac number, because 21002001110211 - 2³³ = 20993411175619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21002001110231) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 156618730 + ... + 156752768.

It is an arithmetic number, because the mean of its divisors is an integer number (498114086400).

Almost surely, 2^{21002001110211} is an apocalyptic number.

21002001110211 is a deficient number, since it is larger than the sum of its proper divisors (10877300419389).

21002001110211 is a wasteful number, since it uses less digits than its factorization.

21002001110211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135760.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21002001110211 its reverse (11201110020012), we get a palindrome (32203111130223).

The spelling of 21002001110211 in words is "twenty-one trillion, two billion, one million, one hundred ten thousand, two hundred eleven".